Investigation of the corrosion-preventing properties of nickel-coated austenitic stainless steel (AISI 304) in NaOH and NaOH + 10% NaCl solutions

• Published in: Inorganic chemistry communications Vol. 152; p. 110671
• Main Authors: Ramdane, Hanene, Benaioun, Noureddine, Guezzoul, M'hamed, Moulayat, Nasreddine, Craciun, Valentin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2023
• Subjects: AES; AFM; AISI 304; cyclic voltammetry and Corrosion; Electrodeposition; Nickel; XPS; cyclic voltammetry and Corrosion; AFM; Electrodeposition; Nickel; XPS; AISI 304; AES
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2023.110671

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•Two electrochemical techniques were used to deposit the nanocrystalline nickel coating onto austenitic stainless steel (AISI 304): chronoamperometry (CA) and linear sweep voltammetry.•Films were examined by XRD, AFM, XPS and Electrochemical techniques.•The AFM results demonstrated the both electrodeposition techniques lead to the formation of a homogeneous granular film onto substrate.•Cyclic voltammetry shows that immersing Ni-coated AISI 304 in NaOH and NaOH + 10%NaCl forms a protective passive film and slows down the corrosion.•XPS results show that the Ni deposit and Ni passive film compositions become enriched in Ni metal, NiO, and Ni (OH)2.
The nickel electrodeposition coating onto a stainless steel AISI 304 substrate was performed in a sulfate–chloride bath using cyclic voltammetry, chronoamperometry, and linear scan voltammetry. The effect of electrodeposition techniques on crystallite size, morphology, chemical composition, and corrosion properties of the coating, was investigated. For characterizing Ni deposition, x-ray diffraction, x-ray photoelectron spectroscopy, Auger electron spectroscopy, and atomic force microscopy have been adopted. The electrochemical behaviour of nanocrystalline Ni was evaluated in 0.1 M NaOH and 0.1 M NaOH+10% NaCl of pH = 13 using voltammetry, combined with X-rays photoelectron spectroscopy, Auger electron spectroscopy. The x-ray diffraction analysis results reveal that the nickel deposit is in a crystalline phase with a crystallite size of 65 nm and 51 nm for cyclic voltammetry and linear scan voltammetry, respectively. The results show that in NaOH or NaCl solutions, a passive nickel oxide film is formed and covers the substrate, which inhibits the oxidation–reduction process and provides excellent corrosion resistance. Besides, the atomic force microscopy results indicate that both electrodeposition techniques lead to the formation of a homogeneous granular film covering the entire substrate. Finally, x-ray photoelectron spectroscopy and Auger electron spectroscopy results show that the compositions of the Ni deposit and Ni passive film become enriched in Ni metal, NiO, and Ni (OH)2.